Printing-press.



A. T, H. BROWER.

PRINTING PRESS.

APPLIOATION FILED 001'. 25, 1995.

Patented Jan. 10, 1911. 1

6 sums-$111121 1.

1 THE NpRRls PETERS ca, wnsmngurcul n. c.

, IA. T. H. BROWER.

PRINTING PRESS.

APPLIOATION FILED 0012.25, 1905.

Patented Jan; 10,1911.

6 SHBBTS SHEHT 3.

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A- T. H. BROWBR.

PRINTING PRESS. APPLICATION FILED OUT. 25, 1906.

Patented Jam 10, 1911.

s sums-sum 4.

F ai 7 ms Fl TERS ca wAsnmcmN, n. c.

A. T. H. BROWEIL,

PRINTING H1388, APPLI OATIO K FILED OCT. 35, 1906.

- Patented Jan. 10, 1911-.

5 mum O A. T. H. BROWBR. PRINTING PRESS. APPLIQATIOH FILED 001225, 1905.

Pat nt i Jan. 10,1911.

UNITED STATES PATENT r ion.

ABRAHAM T. H. BROWER, OF CHICAGO, ILLINOIS.

PRINTING-PRESS.

To all whom it may concern:

Be it known that I, ABRAHAM T. H. Bnownn, a citizen of the UnitedStates, residing at Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements in Printing-Presses, of which I do declare the following to be a full, clear, andexact description, reference being had to the accompanying drawings,forming part of this specification.

The present invention has relation more particularly to that class ofprinting presses known as bed-and-cylinder presses, an early example ofthis type of printing press being set forth in Letters Patent No.56,701, granted to Andrew Campbell July 31, 1866.

The main objects of the present invention are: First: to provideimproved mechanism for effecting the reversal of the reciprocatingtype-carrying bed. Second: to provide an improved construction of gib orshoe for accurately guiding and holding down the bed in itsreciprocating movements. Third: to provide means for adjustment of abed-rack pinion shaft.

In the operation of the bed-and-cylinder presses of the Campbell type,it has been found that when the press is operated at a considerably highrate of speed, the difficulty of providing means for effectivelyreversing and checking the movement of the reciprocating bed has been amost serious one, because inasmuch as the idle or return movement of thebed occurred at a much higher rate of speed than the active or forwardmovement, no adequate means could be provided for controlling themomentum of the bed when running at the widely different speeds. Mypresent invention affords a simple and effective means whereby theforward and return movements of the bed are rendered substantiallyuniform so that a single checking mechanism adapted for controlling themomentum of the bed may be employed. Again, in holding the bed inposition upon its tracks or guide-ways, it has heretofore been thepractice to provide two sets of adjustable shoes or gibs, one setserving to hold the bed down on its-tracks or ways and the other setserving to insure its accurate straight line movement and to compensatefor any wear or deviation in lateral direction. My present inventionfurther contemplates providing gibs or shoes that will serve toadjustably hold the bed in position upon its tracks or ways and com-Specification of Letters Patent. Application filed October 25, 1905.

Patented Jan. 10, 1911. Serial No. 284,277.

pensate for wear in either vertical or lateral direction. By the presentinvention also, provision is made whereby the bed-rack pinion shaft may,from time to time, be adjusted to compensate for wear so as to insurethe accurate meshing of the pinions carried by the bed-rack pinion shaftwith the racks engaging therewith.

Figure 1 is a plan view of a printing press embodying my invention,parts being broken away for better illustratlon. Fig. 2 is a view incentral vertical longitudinal section. Fig. 3 is a detail view incentral vertical section through the inking roll mechanism at one end ofthe press. Fig. 4 is a detail view in vertical section through a portionof the feed board having a feature of my invention applied thereto. Fig.5 is a View in side elevation of a press embodying my invention. Fig. 5is a detail view in section of a part illustrated in Fig. 5. Fig. 6 is adetail view partly in elevation and partly in section showing the clutchmechanism whereby the ink ductor roll is driven. Fig. 7 is a view invertical section on line 77 of Fig. 6. Fig. 8 is a view in verticalcross section upon the line adjacent the bedrack pinion shaft, partsbeing shown in elevation. Fig. 9 is a perspective view showing a portionof the bed, its tracks or ways, the improved shoes or gibs forconnecting the bed to its tracks or ways and the head clamp for holdingthe chase upon the bed. Fig. 10 is a detail perspective view of one ofthe front gibs or shoes that hold the bed in position upon its tracks orways. Fig.

11 is a detail view in cross section showing the means for adjusting thebed-rack pinion shaft. Fig.12 is a detail view in side elevation of thebull-wheel with the bed-rack pinion engaging therewith. Fig. 13 is aview in cross section on line 13--13 of Fig. 12. Figs. 14, 15 and 16 aredetail views showing a portion of the bull-wheel with the studs of thebed-rack pinion engaging the cams of such wheel in different ositions.Fig. 17 is a view in vertical section on line 17-17 of Fig. 14.

In the accom anying drawings A designates the main frame of the pressfrom the sides of which rise suitable standards that sustain theimpression cylinder B that is mounted upon a shaft B. U on one end ofthe impression cylinder shaft B is keyed the bull-wheel C. Thisbull-wheel C is provided upon its inner face with two segmental racks Cand C the rack C facing out whereby are formed respectively the camgrooves or guides D and E. The bull-wheel is provided also, as shown,with a continuous gear C with which will mesh the pinion of the maindrive shaft, but as this forms no part of the present invention it neednot be particularly described.

From side to side of the main frame (see Fig. 8) extends the bed-rackpinion shaft F that is preferably formed of sections connected together.This shaft F passes through and is sustained by eccentric bearing blocksf, f and f that set within suitable housings a, a and a in the centerand sides of the main frame A. Each of the bearing blocks f, f and isprovided with means, such for example as holes f to re ceive aspanner-wrench, whereby it may be turned Within its housing, and througheach housing passes a set screw a whereby the bearing blocks may berigidly held after they have been adjusted. The shaft F has keyedthereto at its center the bed-rack pinion F that engages with the rackit upon the under side of the bed H and it will be readily seen that byadjusting the eccentric bearing blocks f, f and 7, the bed-rack pinion Fmay be raised to compensate for wear and thus insure the accurateengagement of'the pinion F with the bed-rack 72 and to insure also theaccurate meshing of the'pinions on the end of shaft F with thebull-wheel racks.

Upon one end of the bed-rack pinion shaft F are mounted the two pinionsG and G, these pinions being preferably formed upon a common hub that iskeyed to the shaft F. The pinion Gr is adapted to engage with thesegment-rack C of the bull-wheel, while the smaller pinion G is adaptedto engage with the segment-rack C of the bull-Wheel, as clearly shown inFigs. 12 and 14 of the drawings. From the outer face of the largerpinion G project the roll-carrying studs 9 and 9 that will engage thecam blocks (Z and c of the bullwheel and will pass through the camgrooves or guide-ways D and E in manner well understood by thosefamiliar with this class of printing presses. By thus placing thesegment racks C and C of the bullwheel in different planes and byemploying pinions of different size to engage with such racks, themovement transmitted from the bullewheel to the bed through the mediumof the pinions G and G, the bed-rack pinion shaftand the bed-rack pinionto the bed, will be substantially uniform in both directions; that is tosay, the idle or return movement of the bed will be at the same rate ofspeed as the active or forward movement of the bed. Hence, it will beseen that under such condition a mechanism designed for checking the bythose familiar with this class of presses.

This operation is indicated in Figs. ll, 15 and 16 of the drawings. Asthere shown the roller or stud g enters the cam groove E as the rack Cis about to leave or be disengaged from the pinion G. When the rack C isdisengaged from the pinion the roll or stud 9 also enters the cam grooveE which is so shaped so as to arrest the movement of the pinions G and Gand of the bed-rack pinion shaft F. This arresting movement is completedwhen the parts reach the position shown in Fig. 15. The cam groove E isso shaped that, as the bull-wheel advances from the position shown inFig. 15, the cam groove will act upon the roll or stud g to effect theinitial reverse movement of the pinions and of the bed-rack pinion shaftjust before the rack C engages the pinion G, as indicated in Fig. 16.The operation of the cam groove D is of course similar to that of thecam groove E.

Upon suitable cross bars of the main frame A extend the longitudinaltracks or guideways A that serve to sustain the bed H of the press.Preferably these guide-ways A are grooved to receive groups or trains ofanti-friction rolls a that are preferably held at distances apart bybars a wherein the axles of the rolls are journaled. In order to holdthe bed H down upon the rolls a, and in order also to insure the truestraight line reciprocation of the bed H, I have provided the improvedconstruction of gibs or shoes that will next be described. As shown,there are two pairs of these gibs or shoes, the front pair J beingpreferably bolted to arms or extensions h that project forwardly fromone end of the bed H, while the rear pair of shoes K are bolted to theunder side of the bed. The shoes J are formed each with a slot j toreceive the adjusting bolt j whereby the shoe may be held in differentpositions, and each of the shoes J is formed with a downwardly andinwardly extending inclined bearing face j adapted to engage with thecorrespondingly inclined face a of the rail or guide-way A. Similarlythe shoes K are formed with long slots is to receive the bolts wherebythe shoes are adjustably bolted to the under side of the bed H, andthese shoes K have downwardly and inwardly extending arms or portionswith inclined bearing faces 70 that engage the correspondingly inclinedfaces a of the rails or guide-ways A. Hence it will be seen that whenthe est-tee lateral direction.

So far as I am awarethea present invention presents the first instanoein which this double fnnotion -of guidingand holding down the bedhasbeen accomplished by the'sarne shoes. i r 1 upon the bed of thepress. it has heretoforefl been propo'sedto provid' a't the'end 'iij thebed canibloeks or i like Q-XPGll'BlltS irons-11'- gaging the adjacentends of the ch-as'eeoriJ taining the type frn'iE It freqtrently h penshowever; that 'owirrg to ditferene the Wltltll'Of' th-e'c"hase thethfrjow ofthd clamping bloeks'hferetofore provided is insutl'ioient andineft'eotive tor--ret-ai' ningfthe form securely in position-awn thebed; --'l3y my present invention I provide the forwardl end of the bedHiv'it-h elainpbar -M extendin or transversely thereof," thisfbar' being1;

formed therein-that receive thel'bolts m 'wliereby the feet are securely;attaehed to' the termed? and the slilglitly lbwer ed portiomH of 1'bed. In order to enablethetlainpingj M to be firmly held in itsadjusted'position, 3

the under side of the' feet mj the clamping bar are provid t the ends ofwits trailer I can be moved torward or baekward 'to the" desiredextentand yvl'xe n set in ro er' posr- &

tion can be securely heldby means ofthe bolts /72? and by theengagementof the fe'et m with the correspondingly groove tion 71ofthe'bed extension H;

drawings, it will be senthat tli'e "feed board 1 l of the press 18provided upo-n'its -underl side with a metal bjarj) securely fastenedthereto as by screws 7). V l are formed a transverse row othole'sk'andIn thefeed board in the bar 7) are formedcorresponding holes,

these holes in the bar '79 being screw-threaded upon the lower ends ofthese bolts.

praetice it is found howeyer, that'suoh nuts; are apt to Work looseandnotanfreqnentlyi drop down intothe press Whereas pro} viding a threadedtransverse banbenea th; the feed board, the use of nuts for the ad-'justing bolts of the side guide isentirely avoided.

In order to er'lablethe pressirian' to give En threaded nut fp'rovidedWitlr handle which byineans of the bolt 5 anto the i nlr tountain-r'loller a proper reitent of movement corresponding to the characterof the work for which the press is being used, 1:11am pro videdctheimproved? ineehanism: hereinafter desorlibedl and more parii treularlyllustratedan Figs; =1, 6 andl Tot the drawings: if Upon one end of thebedt R that ineshes witlr'the gearwvheel S the In order to look a [typeform in position;

shaft of vvhieh is suit ably ourn aled A the jm-a'in' flftime olf" themachinep This gear j-WheelF-S has its "outer face formed with a caingrooves in Which travels: a" roller bearing 'stird "that projectslaterally fronr the ii pp'er I I a r-in of anelbooylever Sthat ispivoted as adapted to receive an adj Listing *bolt s hav- -'1 aWashertor headyat one end and hav 3*; and this bolt passes through a holeformed i n the end 1 of a; rodor" pi-tlnan S ut sf is thus a dj ustablyconnected to the ldtver arm of the" elbow levei s afiThat part- 0f thebolt '='th -atfpasses through the fpit'nian S is she l'dered" where itbears afg'aiiist ithe lever "S, "so as to allow the pivotal inoi einentof the pitman on the bolt *flh'e opposite end of the" 'ro'd or pit/inairhas a liol e or oonpling'flthrongh Whioh passes a bolt 8 nnilar to bolt8 that carries a threaded niit hav -ing a handle 19%, the bolts 'passingthrough a long lot t forined in -the lower 'ertd of-ajn "elbow jlev'er Tthat is "pivotally ii'ion'nted iip'on a stud j proj eoting from thes'ide'ot the n'iain name ir of tlre'ihaohine. glhenpper "0 f thelboivde'ver 'P'is providedfivitlr1a segment-rack T that engages With"the pin arm carrying a stud. t whereon is pivotally :nioiinted a pawl tthe free ,end fo'f ivliieh engagesWratbht 'ivheel U that -is; lreyed to"the shaft u"oi?'*tlreffountain. roller? 'A spring "25 serves tohold thepawl gzrgenient \vitlr the teeth of the rz'itfchet n'rhelei UfPref'ei'eably} "the ratchet:Wheel 'itorin'ed with casin U from" hiolrprojects a handle 11 wherebythe 3 ratchet \vheol'hnti fouht in roller inay be 1 turned "by hand when required, f From the foregoing desert ption it will seen that by varyin the points, of icoiineo-"ti-o'iifoftheendso'f tierod or pitnaan S to the elbow reverse 'and T,tlie'throiv; of the seyjnifn aok T can be ariedfand hencea correspondingextentof "partial" revolution rnay be given toth." k ffotintain r ollei"U". ,It will" be understood "of" coursetth'at inasriihoh a s the"pinion" T l loosely i'noiinted upon theshaft uofthefountain-roller;this roller will be turned I in one direction only,

t, this pawl, during its backward movement rides freely over the teethof the ratchet wheel U.

I have shown, more particularly in Figs. 2, 5 and 8 of the drawings, thepreferred mechanism for checking the movement of the bed H at the endsof travel in opposite directions, this preferred mechanism comprising anair cylinder IV having a piston therein that is connected to checklevers w and 10 secured upon shafts below the top of the main frame,these shafts having fixed thereto'contact arms IV that are engaged bystops V depending from the under side of the bed H; and the levers w andw are shown as engaged by springs Q02 carried upon rods 10 that passthrough the upper ends of the levers w and w. Inasmuch however, as thislast described mechanism for'checking the movement of the bed H forms nopart of my invention, I do not.

shaft, of two pinions whereby said shaft is driven, a bull-wheel havingsegment racks for respectively engaging said pinions to gdrive saidbed-rack pinion shaft in opposite directions, said bullwheel havingreversing cams between the ends of said racks and means engaged by saidcams and connected to said shaft for reversing the direction of rotationthereof.

2. In a bed and cylinder printing press, the combination with a bed-rackpinion shaft, of two pinions of different diameters whereby said shaftisdriven, a bull-wheel having internal and external segment racksarranged to alternately engage said pinions to drive said shaft inopposite directions at substantially uniform speed, said bull-wheelhaving reversing cams between the endsof said racks and means connectedto said shaft and arranged to be engaged by said reversng cams.

3. In a; bed and cylinder printing press, the combination with acylinder arranged to continuously rotate in one direction and areciprocating bed, of two pinions of dif ferent diameters for drivingsaid bed, a bullwheel fixed to said cylinder and having internal andexternal segment racks arranged at different distances from the centerthereof and in offset relation to alternately and respectively engage.said pinions to drive said bed in opposite directions, saidbullwheelhav1ng reversing cams between the ends of said racks and meansconnected to said pinions and arranged to be engaged by said reversingcams.

4;. In a bed and cylinder printing press, the combination with acylinder arranged to rotate continuously in one direction and areciprocating bed, of a bed-rack pinion shaft geared to said bed, twopinions of different diameters fixed to said shaft, a bull-wheel fixedto said cylinder and having internal and external segment racks arrangedat different distances from its center and in olfset relation toalternately and respectively engage said pinions to drive said bed inopposite directions at substantially uniform speed, said bull-wheelhaving reversing cams arranged between the ends of said racks and saidshaft having eccentric pins arranged to be engaged by said cams.

5. In a printing press, the combination with a reciprocating bed, oftracks whereon said bed is mounted, said tracks having inclined bearingfaces, shoes adjustably secured to the upper face of said bed and havingdownwardly extending, inclined portions engaging the inclined bearingfaces of said tracks.

6. In a printing press, the combination with a cylinder and areciprocating bed having a rack on its lower side, of a bed rack pinionshaft extending beneath said bed and having a pinion meshing with saidrack, a bull wheel on said cylinder having an outer internal and aninner external segment rack, pinions on said shaft arranged to beengaged respectively by said segment racks, a plurality of bearings inwhich said shaft is eccentrically journaled, housings fixed to the frameof the machine in which said bearings are rotatably adjustable, andmeans for holding said bearings in adjusted position, substantially asdescribed.

7. In a printing press, the combination with a reciprocating bed andwith a revoluble cylinder, of a shaft geared to said bed, a pair ofpinions of different diameters on said shaft, a bull wheel connected tosaid cylinder and having internal and external segment racks arranged torespectively ongage said pinions to drive said shaft and bed in oppositedirections at substantially uniform rates of speed, and means forchecking and reversing the movements of said shaft and bed,substantially as described.

8. In a printing press, the combination with a bed rack pinion shaft, ofadjustable eccentric bearings for said shaft, said eccentric bearingsbeing provided with holes to receive a spanner wrench and means forholding said eccentric bearings in adjusted position.

9. In a printing press, the combination with a reciprocating bed andwith a revoluble cylinder, of a shaft geared to said bed, a pair ofpinions of different diameters fixed on said shaft, a bull Wheelconnected to said cylinder and having an outer internal and an innerexternal segment rack arranged to respectively engage said pinions todrive said shaft and bed in opposite directions at substantially uniformrates of speed, said bull Wheel having reversing cams and said 1 shafthaving eccentric pins arranged to be 10 engaged by said reversing cams,and means for checking said bed at the opposite ends of its movement,substantially as described.

ABRAHAM T. H. BROWER.

Witnesses LILLIAN PRENTIGE, KATHARINE GERLAOH.

